Antenna



FIG. 1 is a perspective view of the front, rear, top and one side of an antenna showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof, the left side elevational view being identical thereto;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an antenna, as shown and described. 